Video signal bit rate reduction apparatus having adaptive quanti

Details Video signal bit rate reduction apparatus having adaptive quanti Video signal bit rate reduction apparatus having adaptive quanti

1993-06-11

1996-01-02

Chin, Tommy P.

Television

Bandwidth reduction system

Data rate reduction

348404, 348390, H04N 730

Patent

active

054813093

ABSTRACT:
When quantizing the components transformed in each block, the transformed components in the block are classified into plural sets, and the quantizing width is determined in each classification, and when quantizing with a large quantizing width, the quantizing width of the transformed component belonging to the set of the transformed components less important visually is set larger.

REFERENCES:
patent: 4780761 (1988-10-01), Daly et al.
patent: 4908862 (1990-03-01), Kaneko
patent: 5150208 (1992-09-01), Otaka et al.
patent: 5237410 (1993-08-01), Inoue
patent: 5241401 (1993-08-01), Fujiwara et al.
patent: 5321440 (1994-06-01), Yanagihara et al.
Patent Abstracts of Japan, vol. 13, No. 570 (P-977) 18 Dec. 1989 & JP-A-01 237 774 (Konica Corp) 22 Sep. 1989.
"Motion Video Adaptive Quantization in the Transform Domain", CA Gonzeles, E. Viscito, IEEE, 1991.

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